165525065 has 8 divisors (see below), whose sum is σ = 198701640. Its totient is φ = 132372352.

The previous prime is 165525053. The next prime is 165525067. The reversal of 165525065 is 560525561.

It can be written as a sum of positive squares in 4 ways, for example, as 8248384 + 157276681 = 2872^2 + 12541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165525065 - 2⁴ = 165525049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165525067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18221 + ... + 25749.

It is an arithmetic number, because the mean of its divisors is an integer number (24837705).

Almost surely, 2^165525065 is an apocalyptic number.

It is an amenable number.

165525065 is a deficient number, since it is larger than the sum of its proper divisors (33176575).

165525065 is an equidigital number, since it uses as much as digits as its factorization.

165525065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11931.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 165525065 is about 12865.6544722762. The cubic root of 165525065 is about 549.0618331312.

The spelling of 165525065 in words is "one hundred sixty-five million, five hundred twenty-five thousand, sixty-five".